Radiant energy – Ionic separation or analysis – Static field-type ion path-bending selecting means
Patent
1978-04-05
1980-02-26
Claffy, Kathleen H.
Radiant energy
Ionic separation or analysis
Static field-type ion path-bending selecting means
179170R, 250199, 250205, 307311, H04B 158, H04B 900
Patent
active
041907477
ABSTRACT:
A remote gain controlled optocoupled device is disclosed utilizing a DC reference voltage in the output section to compensate for variations in the optocoupling characteristics of the circuit. The DC voltage level output of the photodetector, which is a function of the light transfer characteristics of the circuit, is compared to a remotely controlled reference DC level. The output AC signal level, which substantially tracks the DC voltage output, is gain adjusted under control of the compared DC voltage levels.
REFERENCES:
patent: 3504127 (1970-03-01), Slana
patent: 3772514 (1973-11-01), Sunderland
patent: 3952205 (1976-04-01), Tobey, Jr. et al.
patent: 3991279 (1976-11-01), Morgan
patent: 4032843 (1977-06-01), Loucks
patent: 4045615 (1977-08-01), James
patent: 4056719 (1977-11-01), Waaben
patent: 4070572 (1978-01-01), Summerhayes
Feiner Alexander
Liu Chao Kai
Waaben Sigurd G.
Bell Telephone Laboratories Incorporated
Claffy Kathleen H.
Myers Randall P.
Tannenbaum David H.
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